Valtion Teknillinen Tutkimuskeskus

Teknologian Tutkimuskeskus Vtt

Raisio Benecol Ltd.

Upm-kymmene Corporation

Hannu Mikkonen

Sami Turunen

Soili Hellevi Peltonen

Pia Qvintus-Leino

Kirsi Kataja

Mauno Miettinen

Eino Sivonen

Kyösti Valta

Timo Petteri Paronen

Leila Pohjola

Tarja Sinkko

Sari Hyvärinen

Maija Elina Heikkil&auml;

Soili Peltonen

Maarit Tarvainen

Elina Heikkil&auml;

Erkki Anttila

Anneli Lindeman

Jouni Hamara

Thomas Gädda

Saija Luukkanen

Petri Varjos

Kimmo Koivunen

Kaisa Putkisto

Nina Pykäläinen

Aki Laine

Juha Sarlin

Tero Malm

Anne Kallioinen

Anna Suurnäkki

Vesa Kunnari

Saija Luukkainen

Allan Johansson

Particles of a polysaccharide derivative, having at least one substituent with conjugated unsaturated bonds and exhibiting an index of refraction in excess of 1.50 and a method for the production thereof. In the method, the raw-material is suspended in an organic solvent to form a suspension, which is contacted with an organic reactant comprising a residue with conjugated unsaturated bonds; the raw-material and the organic reactant are reacted to form a derivative exhibiting ester or ether bond between the raw-material and the residue with conjugated unsaturated bonds; the polysaccharide derivative is dissolved in a solvent to form a solution; and the solution is contacted with a non-solvent to precipitate particles of the polysaccharide derivative. The invention provides lightweight, optically improved organic pigments and fillers based on renewable resources and which are recyclable by combustion or composting.

Polysaccharide-based pigments and fillers

The present invention relates to a light, biodegradable, organic pigment and filler, and a method of manufacturing it. According to the present invention, a solution comprising a starch derivative is first prepared by dissolving the starch derivative into a suitable solvent, and, after that, the solution is brought into contact with a non-solvent to precipitate the starch derivative from the solvent, and, as a result, a dispersion is obtained, one which comprises a precipitate consisting of starch derivative and a liquid phase formed of the solvent and the non-solvent, after which the solvent is removed from the liquid phase and the precipitate is separated from the non-solvent and recovered. The present invention can be used to manufacture both a product comprising 100-300 nm spherical particles, which is suitable for use as a pigment, and a coral-like, porous product which is particularly suitable as a filler.

Pigment and filler and a method of manufacturing it

A material which is suitable as filler or coating pigment for a fibrous web and a method for manufacturing thereof. According to the method, a feed comprising organic polymer material is cooled to at least approximately &#x2212;50&#xb0; C., after which it is refined in a jet refiner to a desired particle size. The present invention generates uniform pigment particles which comprise, for instance, starch esters, and which particles have a porous surface structure, in which case they are suitable for instance as coating pigments and fillers for offset and ink-jet papers.

Starch-based filler and coating pigment composition for fibre webs and method for the manufacture thereof

The invention relates to novel transglycosylation products and their preparation. The transglycosylation products according to the invention are prepared from starch derivatives, such as esters or ethers of starch. The products are obtained by reacting a starch derivative with an alcohol in the presence of an acid catalyst. The forming product is separated by precipitation or by removing any unreacted alcohol by evaporation. In the products according to the invention the good properties of starch derivatives, such as the excellent water resistance of esters, are combined with the versatility of transglycoside products. The products can be used as adhesives, in which case they are formulated, for example as hot-melt adhesives, and as comonomers, prepolymers or macroinitiators in the preparation of polymers.

Starch derivatives and a method for their preparation

A process for manufacturing transglycosylation products. According to the process, a starch derivative is reacted at acidic conditions with an alkanol containing 1-6 hydroxyl groups and the reaction product is recovered as such or it is subjected to further processing. According to the method, the transglycosylation reaction between the starch derivatives and the alkanol is carried out in a reactive extrusion process, whereby the reaction can essentially be performed in the absence of liquid media at high yield. The invention also relates to new transglycosylation products of starch derivative, containing anions derived from a phosphorus-containing acid, which are chemically bonded to the product.

Starch-based composition and process for the production thereof

A polymer dispersion or solution containing a hydrophobic polysaccharide, which is dispersed or dissolved in liquid phase, and plasticizer composition of the polysaccharide, whereby at least 10% by weight of the plasticizer composition is formed from alkenyl succinic anhydride. The invention also relates to the preparation of polymer dispersions and solutions and to the films and coatings produced from them. The dispersions according to the invention are stable, and coating with excellent film-forming properties can be prepared from them.

Polymer solution and dispersion and a process for the preparation thereof

The invention relates to an adhesive formulation that comprises a starch-based adhesive dissolved in water. According to the invention the adhesive is made up of a native starch transglycosylation product and the solids content of the adhesive formulation is at least 45% by weight. The invention also relates to a method for preparing such adhesive formulations and to the use of the adhesives.

Starch-based adhesives

The invention relates to a new process for preparing polymer dispersions. According to the invention, a mixture is first formed of a polymer component, a plasticizer, dispersion auxiliaries and water, the mixture is then heated to approximately 20 to 100&deg; C. in order to form a paste-like composition, and the paste-like composition is dispersed in water. The dispersion obtained according to the invention can be used for coating paper or board, as a primer, as a component in adhesives, paint or lacquer, and it is also suited for the manufacture of cast films and for use as a binder in materials based on cellulosic fibers.

Process for the preparation of polymer dispersions

The invention concerns dietary fat compositions that contain the hydroxy acid or dicarboxylic acid or amino acid esters of a phytosterol and/or phytostanol, or the mixed esters formed with the alcohols, polyols or polyol (C . . . C )-fatty acid esters of dicarboxylic acids or hydroxy acids, or the (C . . . C )-fatty acid esters of hydroxy acids.

Use of organic acid esters in dietary fat

Growing community of inventors

Rajamäki, Finland

Hannu Mikkonen